Art is purposiveness without purpose.

In man (as the only rational creature on earth) those natural capacities which are directed to the use of his reason are to be fully developed only in the race, not in the individual.

Nothing is divine but what is agreeable to reason.

Space and time are the framework within which the mind is constrained to construct its experience of reality.

The sceptics, a kind of nomads, despising all settled culture of the land, broke up from time to time all civil society. Fortunately their number was small, and they could not prevent the old settlers from returning to cultivate the ground afresh, though without any fixed plan or agreement.

Do the right thing because it is right.

We can judge the heart of a man by his treatment of animals.